I see occasional jaggies on diagonals, and as kuzano points out this can be caused by aliasing at least, with the weaker anti-aliasing filter on the M8 to blame.. but the added details you gain from having the weaker filter is definitely worth it.
I have an R-D1 as well and the m8 files are better with the aliasing than my R-D1 files were sometimes, though perhaps i've not punished it enough yet to recreate those conditions.
MikeL you make a good point and one that i've not had chance to test yet, my hp A4 printer has gone unused for a good while, i often use photobox (online print shop in UK) to print things.. To be honest i'm really bad with that, i've not printed one of my m8 shots yet.. I enjoy sharing them online, looking at them on my CRT, notebooks, and digital projector screens. I will get some of my recent faves printed though.
I agree i'm mostly happy with the shots, i just do appreciate what my friend was saying, to explain more clearly what i mean here is a shot taken with my fuji f30 compact at ISO 1600
view it at 100% (original file) and see the out of focus rendering of his hind leg to see the effect, although its all over the image really. a mottling of colour that's been done to kill all signs of "noise".. its this kind of a look that i sometimes see, only much much more slighter in some of the textures of my M8 shots viewed at 100%.. and its this that i would like to know if i could eliminate by keeping the C1 sharpness low, or overriding C1's noise reduction settings etc.
That and any other recommendations really to get the best out of the m8 files.